Is water a catalyst when iron rusts? Does iron react with water when rusty?

Water is the catalyst.

The process of the reaction is as follows: after oxygen is dissolved in water, hydrogen ions and hydroxide ions are ionized, hydrogen ions and iron react to form ferrous ions, ferrous ions and hydroxide ions react to form ferrous hydroxide and then oxidize to iron hydroxide, and then lose water to form iron oxide.

In this process, neon participates in the reaction and changes the rate of the reaction, but its quantity and properties do not change, so it is a catalyst.

It's not a catalyst, it's a solvent that provides the reaction conditions.

The premise of the catalyst is to participate in the reaction, which is the premise, without which other conclusions are useless. Water can be used as a catalyst, for example, a mixture of iodine and zinc, which drops into the water and immediately reacts violently.

Generally speaking, the catalyst does not participate in the chemical reaction, but it can accelerate or reduce the reaction speed of the chemical reaction, and the water in the metathesis reaction you said does not participate in the chemical reaction, and only provides the medium for the reaction, not the catalyst.

Of course not, iron rusting is a chemical reaction, and water is involved in this reaction and itself has a chemical change, so it is not a catalyst.

It's a reactant.

There is this experiment in junior high school**:

It probably means that the iron nail is put into three test tubes, one is dry air (sealing) and one test tube is filled with half of the test tube's water, but a part of the iron nail is left in the air, the third test tube is filled with water and the iron nail is submerged, and then sealed with a layer of oil, and after a few days, it will be found that only the iron nail in the second test tube is rusty, this experiment proves that iron rust must meet the needs of air and water at the same time, that is to say, the iron nail is the most prone to rust in humid air.

The main ingredient that comes into play in the air is oxygen.

The main component of rust is ferric oxide (reddish-brown).

Iron rust is a complex chemical reaction, and the reaction exothermic is a slow oxidation phenomenon, from which it is concluded that the higher the humidity in the air, the more likely the iron is to rust, and the humidity depends on the water vapor contained in the air.

It's oxygen, and there's oxygen in the water.

Water is made up of oxygen and hydrogen.

Because although the oxygen in the air accounts for most of it, it is not as large as the contact surface with oxygen in the water.

Water is involved in the reaction.

2Fe + 3O2 + XH2O = = Fe2O3 * XH2O (rust).

2Fe O2 2H2O===2Fe(OH)24Fe(OH)2 O2 2H2O===4Fe(OH)3 Two steps to rent a bend is the reason why the water tease sail will speed up the rust of iron.

The total equation is: 4Fe + 6H2O + 3O2 = 4Fe(OH)3 followed by rust: 2Fe(OH)3===Fe2O3·XH2O (3-X)H2O

Note: Fe2O3·XH2O is rust.

3-x)H2O represents the measured number of hail water molecules.

The x-value in rust is not fixed.

Iron rusting when exposed to air actually involves a galvanic cell reaction. Iron and carbon form galvanic cells (because iron is not pure and contains other elements such as C).

The Wolf Hunter team will answer for you.

Hope it helps. Wangjun.

Common sense also knows that iron is prone to rust in a humid environment, and in fact water is a necessary condition for rust.

Iron rust is a complex physicochemical reaction process, and its essence is the hydrate of a variety of oxides of iron and the oxygen and water vapor in the air that act together. The composition of rust is complex and is usually abbreviated as Fe2O3·XH2O. So rust can be said to be a mixture.

Due to the presence of water (carbon dioxide dissolved to form an electrolyte solution), impurities (carbon, etc.) in iron form galvanic cells with iron, accelerating the consumption of iron and causing rust.

Negative reaction: Fe-2e Fe2+

Fe2+ is rapidly oxidized by oxygen in the air to produce rust.

4fe(oh)2+o2+2h2o＝＝4fe(oh)3

At pH, oxygen absorption corrosion occurs:

2Fe + O2 + 2H2O = 2Fe (Oh) 2, and ferrous hydroxide is very easy to be oxidized to iron hydroxide, the equation is 4Fe (Oh) 2 + O2 + 4H2O = 4Fe (Oh) 3, iron hydroxide itself is reddish-brown like rust, and iron hydroxide is further dehydrated in the air to generate Fe2O3·xH2O, X<1, that is, rust is generated.

Hello! Due to the presence of water (dissolved.

The presence of iron and impurities (carbon, etc.) will form a galvanic cell with iron, accelerating the consumption of iron and rusting.

Negative reaction: Fe-2e Fe2+

Fe2+ is rapidly oxidized by oxygen in the air to produce rust.

4Fe(OH)2+O2+2H2O 4Fe(OH)3 only represents a personal opinion.

At pH, oxygen absorption corrosion occurs in the royal digging:

2Fe+O2+2H2O=2Fe(OH)2, and ferrous hydroxide is very easy to be oxidized to iron hydroxide, the equation is.

4Fe(OH)2+O2+4H2O=4Fe(OH)3, the vertical iron of the hydroxide bureau itself is reddish-brown like rust, and the iron hydroxide is further dehydrated in the air to form Fe2O3·XH2O, X<1, that is, the formation of rust tung dismantling.